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   <div id="projectbrief">Reranking framework for structure prediction and discriminative language modeling</div>
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<a href="feature-vector-writer_8_h.html">Go to the documentation of this file.</a><div class="fragment"><pre class="fragment"><a name="l00001"></a>00001 <span class="comment">// Copyright 2012, Google Inc.</span>
<a name="l00002"></a>00002 <span class="comment">// All rights reserved.</span>
<a name="l00003"></a>00003 <span class="comment">// </span>
<a name="l00004"></a>00004 <span class="comment">// Redistribution and use in source and binary forms, with or without</span>
<a name="l00005"></a>00005 <span class="comment">// modification, are permitted provided that the following conditions are</span>
<a name="l00006"></a>00006 <span class="comment">// met:</span>
<a name="l00007"></a>00007 <span class="comment">// </span>
<a name="l00008"></a>00008 <span class="comment">//   * Redistributions of source code must retain the above copyright</span>
<a name="l00009"></a>00009 <span class="comment">//     notice, this list of conditions and the following disclaimer.</span>
<a name="l00010"></a>00010 <span class="comment">//   * Redistributions in binary form must reproduce the above</span>
<a name="l00011"></a>00011 <span class="comment">//     copyright notice, this list of conditions and the following disclaimer</span>
<a name="l00012"></a>00012 <span class="comment">//     in the documentation and/or other materials provided with the</span>
<a name="l00013"></a>00013 <span class="comment">//     distribution.</span>
<a name="l00014"></a>00014 <span class="comment">//   * Neither the name of Google Inc. nor the names of its</span>
<a name="l00015"></a>00015 <span class="comment">//     contributors may be used to endorse or promote products derived from</span>
<a name="l00016"></a>00016 <span class="comment">//     this software without specific prior written permission.</span>
<a name="l00017"></a>00017 <span class="comment">//</span>
<a name="l00018"></a>00018 <span class="comment">// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS</span>
<a name="l00019"></a>00019 <span class="comment">// &quot;AS IS&quot; AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT</span>
<a name="l00020"></a>00020 <span class="comment">// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR</span>
<a name="l00021"></a>00021 <span class="comment">// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT</span>
<a name="l00022"></a>00022 <span class="comment">// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,</span>
<a name="l00023"></a>00023 <span class="comment">// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT</span>
<a name="l00024"></a>00024 <span class="comment">// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,           </span>
<a name="l00025"></a>00025 <span class="comment">// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY           </span>
<a name="l00026"></a>00026 <span class="comment">// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT</span>
<a name="l00027"></a>00027 <span class="comment">// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE</span>
<a name="l00028"></a>00028 <span class="comment">// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.</span>
<a name="l00029"></a>00029 <span class="comment">// -----------------------------------------------------------------------------</span>
<a name="l00030"></a>00030 <span class="comment">//</span>
<a name="l00031"></a>00031 <span class="comment">//</span>
<a name="l00036"></a>00036 <span class="comment"></span>
<a name="l00037"></a>00037 <span class="preprocessor">#ifndef RERANKER_FEATURE_VECTOR_WRITER_H_</span>
<a name="l00038"></a>00038 <span class="preprocessor"></span><span class="preprocessor">#define RERANKER_FEATURE_VECTOR_WRITER_H_</span>
<a name="l00039"></a>00039 <span class="preprocessor"></span>
<a name="l00040"></a>00040 <span class="preprocessor">#include &lt;string&gt;</span>
<a name="l00041"></a>00041 
<a name="l00042"></a>00042 <span class="preprocessor">#include &quot;../proto/model.pb.h&quot;</span>
<a name="l00043"></a>00043 <span class="preprocessor">#include &quot;<a class="code" href="feature-vector_8_h.html" title="Defines the reranker::FeatureVector class, which, as it happens, is used to store feature vectors...">feature-vector.H</a>&quot;</span>
<a name="l00044"></a>00044 <span class="preprocessor">#include &quot;<a class="code" href="symbol-table_8_h.html" title="Provides the reranker::Symbols interface as well as the reranker::StaticSymbolTable implementation...">symbol-table.H</a>&quot;</span>
<a name="l00045"></a>00045 
<a name="l00046"></a>00046 <span class="keyword">namespace </span>reranker {
<a name="l00047"></a>00047 
<a name="l00048"></a>00048 <span class="keyword">using</span> confusion_learning::FeatureMessage;
<a name="l00049"></a>00049 <span class="keyword">using</span> confusion_learning::FeatureVecMessage;
<a name="l00050"></a>00050 <span class="keyword">using</span> confusion_learning::FeatureMessage_FeatureType;
<a name="l00051"></a>00051 
<a name="l00052"></a>00052 <span class="keyword">using</span> std::string;
<a name="l00053"></a>00053 
<a name="l00059"></a>00059 <span class="keyword">template</span> &lt;<span class="keyword">typename</span> FV&gt;
<a name="l00060"></a><a class="code" href="classreranker_1_1_feature_vector_writer.html">00060</a> <span class="keyword">class </span><a class="code" href="classreranker_1_1_feature_vector_writer.html" title="A class to serialize FeatureVector instances to FeatureVecMessage instances.">FeatureVectorWriter</a> {
<a name="l00061"></a>00061  <span class="keyword">public</span>:
<a name="l00075"></a><a class="code" href="classreranker_1_1_feature_vector_writer.html#a10d99f419685418695e72c427971714e">00075</a>   <span class="keywordtype">void</span> <a class="code" href="classreranker_1_1_feature_vector_writer.html#a10d99f419685418695e72c427971714e" title="Serializes a single feature-value pair to a FeatureMessage.">SerializeFeature</a>(<span class="keyword">const</span> <span class="keyword">typename</span> FV::key_type &amp;uid,
<a name="l00076"></a>00076                         <span class="keyword">const</span> <span class="keyword">typename</span> FV::mapped_type &amp;value,
<a name="l00077"></a>00077                         FeatureMessage_FeatureType feature_type,
<a name="l00078"></a>00078                         FeatureMessage *feature_message,
<a name="l00079"></a>00079                         <a class="code" href="classreranker_1_1_symbols.html" title="An interface specifying a converter from symbols (strings) to int indices.">Symbols</a> *symbols = NULL)<span class="keyword"> const </span>{
<a name="l00080"></a>00080     feature_message-&gt;set_id(uid);
<a name="l00081"></a>00081     feature_message-&gt;set_type(feature_type);
<a name="l00082"></a>00082     feature_message-&gt;set_value(value);
<a name="l00083"></a>00083     <span class="keywordflow">if</span> (symbols != NULL) {
<a name="l00084"></a>00084       <span class="keyword">const</span> <span class="keywordtype">string</span> &amp;name = symbols-&gt;GetSymbol(uid);
<a name="l00085"></a>00085       <span class="keywordflow">if</span> (name != <span class="stringliteral">&quot;&quot;</span>) {
<a name="l00086"></a>00086         feature_message-&gt;set_name(name);
<a name="l00087"></a>00087       }
<a name="l00088"></a>00088     }
<a name="l00089"></a>00089   }
<a name="l00090"></a>00090 
<a name="l00104"></a><a class="code" href="classreranker_1_1_feature_vector_writer.html#aca8177e0f5f8c4ce8ee8d30238eec8d1">00104</a>   <span class="keywordtype">void</span> <a class="code" href="classreranker_1_1_feature_vector_writer.html#aca8177e0f5f8c4ce8ee8d30238eec8d1" title="Serializes the specified feature vector to the specified FeatureVecMessage protocol buffer message...">Write</a>(<span class="keyword">const</span> FV &amp;features,
<a name="l00105"></a>00105              FeatureMessage_FeatureType feature_type,
<a name="l00106"></a>00106              FeatureVecMessage *fv_message,
<a name="l00107"></a>00107              <a class="code" href="classreranker_1_1_symbols.html" title="An interface specifying a converter from symbols (strings) to int indices.">Symbols</a> *symbols = NULL)<span class="keyword"> const </span>{
<a name="l00108"></a>00108     <span class="keywordflow">for</span> (<span class="keyword">typename</span> FV::const_iterator feature_it = features.begin();
<a name="l00109"></a>00109          feature_it != features.end();
<a name="l00110"></a>00110          ++feature_it) {
<a name="l00111"></a>00111       FeatureMessage *feature_message = fv_message-&gt;add_feature();
<a name="l00112"></a>00112       <a class="code" href="classreranker_1_1_feature_vector_writer.html#a10d99f419685418695e72c427971714e" title="Serializes a single feature-value pair to a FeatureMessage.">SerializeFeature</a>(feature_it-&gt;first,
<a name="l00113"></a>00113                        feature_it-&gt;second,
<a name="l00114"></a>00114                        feature_type,
<a name="l00115"></a>00115                        feature_message,
<a name="l00116"></a>00116                        symbols);
<a name="l00117"></a>00117     }
<a name="l00118"></a>00118   }
<a name="l00119"></a>00119 };
<a name="l00120"></a>00120 
<a name="l00123"></a>00123 <span class="keyword">template</span> &lt;<span class="keyword">typename</span> V&gt;
<a name="l00124"></a><a class="code" href="classreranker_1_1_feature_vector_writer_3_01_feature_vector_3_01string_00_01_v_01_4_01_4.html">00124</a> <span class="keyword">class </span><a class="code" href="classreranker_1_1_feature_vector_writer.html" title="A class to serialize FeatureVector instances to FeatureVecMessage instances.">FeatureVectorWriter</a>&lt;<a class="code" href="classreranker_1_1_feature_vector.html" title="A class to represent a feature vector, where features are represented by unique identifiers, and feature values are represented by the template type.">FeatureVector</a>&lt;string,V&gt; &gt;  {
<a name="l00125"></a>00125  <span class="keyword">public</span>:
<a name="l00126"></a><a class="code" href="classreranker_1_1_feature_vector_writer_3_01_feature_vector_3_01string_00_01_v_01_4_01_4.html#ad317560e2b6dda7e5c6ebd6e4473cb1c">00126</a>   <span class="keywordtype">void</span> <a class="code" href="classreranker_1_1_feature_vector_writer.html#aca8177e0f5f8c4ce8ee8d30238eec8d1" title="Serializes the specified feature vector to the specified FeatureVecMessage protocol buffer message...">Write</a>(<span class="keyword">const</span> <a class="code" href="classreranker_1_1_feature_vector.html" title="A class to represent a feature vector, where features are represented by unique identifiers, and feature values are represented by the template type.">FeatureVector&lt;string,V&gt;</a> &amp;features,
<a name="l00127"></a>00127              confusion_learning::FeatureMessage_FeatureType feature_type,
<a name="l00128"></a>00128              FeatureVecMessage *fv_message)<span class="keyword"> const </span>{
<a name="l00129"></a>00129     <span class="keyword">typedef</span> <span class="keyword">typename</span> <a class="code" href="classreranker_1_1_feature_vector.html#a8dc4093ae778bffb30d2840002f02ba1" title="The type of const iterator for the feature-weight pairs in this vector.">FeatureVector&lt;string,V&gt;::const_iterator</a> const_iterator;
<a name="l00130"></a>00130     <span class="keywordflow">for</span> (const_iterator feature_it = features.<a class="code" href="classreranker_1_1_feature_vector.html#ae0c185e646996daff25fcad9b224eda5" title="Returns a const iterator pointing to the first of the feature-value pairs of this feature vector...">begin</a>();
<a name="l00131"></a>00131          feature_it != features.<a class="code" href="classreranker_1_1_feature_vector.html#a9f2539faf4e600c2f75b613763d49fcd" title="Returns a const iterator pointing to the end of the feature-value pairs of this feature vector...">end</a>();
<a name="l00132"></a>00132          ++feature_it) {
<a name="l00133"></a>00133       FeatureMessage *feature_message = fv_message-&gt;add_feature();
<a name="l00134"></a>00134       <span class="comment">// Note that, crucially, we use FeatureMessage::set_name and not</span>
<a name="l00135"></a>00135       <span class="comment">// FeatureMessage::set_id, as above.</span>
<a name="l00136"></a>00136       feature_message-&gt;set_name(feature_it-&gt;first);
<a name="l00137"></a>00137       feature_message-&gt;set_type(feature_type);
<a name="l00138"></a>00138       feature_message-&gt;set_value(feature_it-&gt;second);
<a name="l00139"></a>00139     }
<a name="l00140"></a>00140   }
<a name="l00141"></a>00141 };
<a name="l00142"></a>00142 
<a name="l00143"></a>00143 }  <span class="comment">// namespace reranker</span>
<a name="l00144"></a>00144 
<a name="l00145"></a>00145 <span class="preprocessor">#endif</span>
<a name="l00146"></a>00146 <span class="preprocessor"></span>
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